How to do the quality inspection of dust collector filter bags?

The quality of a dust collector filter bag is related to a variety of factors, but it mainly depends on the filter media.

Dust collector filter bag filter material is synthetic fiber, natural fiber or glass fiber woven cloth or felt, according to the design needs of the dust collector and then sew the cloth or felt into a cylinder or flat filter bag, according to the nature of the flue gas, select the filter material suitable for the application premise, usually, in the flue gas temperature is lower than 120, the filter material is required to have acid resistance and durability, often choose polyester flannel cloth and polyester needle felt, in the treatment of high temperature flue gas (< 250), the main choice of graphitized glass cloth, in some special cases, the selection of carbon fiber filter material, etc.

The working mechanism of dust removal in the filter bag of the dust collector is that the dusty flue gas passes through the filter material, and the dust particles are filtered down, and the filter material mainly relies on inertial collision to capture coarse-grained dust, and the fine-grained dust is mainly collected by diffusion and screening. The dust layer of the filter material also has a certain filtering effect, and the cleaning of the filter bag of the dust collector. Because the damaged filter bags such as abrasion and holes are repaired, a high reuse rate is guaranteed.

The instrument is used to test the physical indicators of the cleaned filter bag to ensure that the cleaning quality meets the requirements. Through the treatment of the above processes, the cleaned filter bag can fully meet the requirements of use.

For dust bags, the contents that need to be verified and tested are as follows:

1.Appearance inspection: punctures, defects, black spots, jumpers, broken wires, joints, etc.

2.Physical properties: such as the mass per unit area of the bag, thickness, amplitude, weaving structure, fabric density, bulk density of nonwovens, porosity, etc.

3.Mechanical properties: such as the breaking strength and elongation of the dust removal bag, the elongation of the warp and weft load of the bag, the expansion and bursting strength of the filter material, etc.

4.Dust filter characteristics: such as resistance coefficient, static dust removal efficiency, dynamic dust removal efficiency, dynamic resistance of filter material, regeneration resistance coefficient and dust peeling rate.

5.Special functional properties: such as temperature resistance, corrosion resistance, electrostatic properties, hydrophobicity, etc.

Shanghai Keggus Filter Material is a new type of environmental protection enterprise dominated by various environmental protection filter products. Since its establishment, the company has been committed to the research and development of liquid-solid, gas-solid separation filter materials and product sales. The company has a group of professional product development technicians and a business team with many years of industry sales experience, and has a production and R&D base in Shanghai, which can provide good pre-sales and after-sales service and support for the majority of users.

The company's current products mainly include a variety of non-woven needle-punched filter felts and woven woven materials and filter bags, filter cartridges and other products derived from them, which are widely used in steel, cement, chemical industry, power plants, waste incineration, road construction, metallurgy, food processing, electronics, wood, tobacco and other environmental protection projects, and are sold all over the country.

The company's corporate philosophy of "integrity-based, quality first, service for survival, innovation and development" spurs every employee and contributes to the creation of first-class products with international standards.

1. Select the dust removal bag according to the nature of the dust 2, select the dust removal bag according to the cleaning method of the dust collector equipment 3, and select the dust removal bag according to the nature of the dust-containing gas. The dust bag is bad, and the main thing is the filter material.

The contents of the requirements verification and test are as follows:

1.Appearance inspection: punctures, defects, black spots, jumpers, broken wires, joint numbers.

2.Physical properties: such as the unit area quality, thickness, fluctuation of the dust collector bag, the arrangement of the woven fabric, the density of the fabric, the bulk density of the nonwoven, the porosity, etc.

3.Mechanical properties: such as the cracking strength and cracking elongation of the dust collector bag, the warp and weft load elongation of the bag, and the expansion and bursting strength of the filter material.

4.Dust filter characteristics: such as resistance coefficient, static dust removal power, dynamic dust removal power, dynamic resistance of filter material, regeneration resistance coefficient and dust peeling rate.

5.Special functional characteristics: such as temperature resistance, corrosion resistance, electrostatic properties, hydrophobicity, etc.

The requirements for dust removal filter bags are as follows:

a. For the sewn filter bag, the size and accessories should be checked to see if they are correct, and the sewing thread should be trimmed.

B. On the special test bench, the appearance and specification size (inner diameter or inner circumference and length) of the filter bag are inspected according to the GB T12625 standard. The length inspection of the inner filter round bag should be carried out at the rated tension. The jumping yarn and joints of the woven filter material should be treated with resin.

c. For the filter bag with an expansion ring sewn at the mouth of the bag, the sample bag should be sewn first, and the bag mouth should be tested and installed with the bag cap or pattern plate hole mold provided by the user, and after confirming the appropriate elastic fit, the outer diameter of the expansion ring should be verified, and the sample bag size should be cut and sewn in batches.

d. When packing the glass fiber filter bag, the fold of the bag body should be avoided as much as possible, and the filter bag packaging box should be marked that it cannot be pressed. Exposed spikes should not be used on the box of the coated filter bag to prevent damage**.

1. The characteristics (temperature, chemistry) of the dust-containing gas processed by the dust collector. 2. Characteristics of dust. 3. The cleaning method of the dust collector.

Gram weight, filter bag damage, filter bag appearance inspection, filter bag breaking strength and elongation at break, filter bag air permeability determination, unit area quality test, material analysis, etc.

The qualified dust collector bag filter hole is small, which can better achieve the dust removal effect.